Effect of Clear Aligner Attachment Size on Extrusion of Maxillary Lateral Incisors (NCT06814262) | Clinical Trial Compass
CompletedNot Applicable
Effect of Clear Aligner Attachment Size on Extrusion of Maxillary Lateral Incisors
United States28 participantsStarted 2025-03-31
Plain-language summary
Orthodontic treatment has been revolutionized by clear aligner therapy, offering patients a more esthetic and comfortable alternative to traditional braces. In 1999, Align Technology introduced Invisalign. As Invisalign has increased in popularity and demand over the past two decades, clinical trials have shed light on the efficacy of Invisalign treatment. there have been changes in the Invisalign protocol such as introduction of SmartForce features in 2008, such as optimized attachments as well as the implementation of SmartTrack aligner material in 2011. Compared to conventional fixed orthodontic appliances, Invisalign cannot be adjusted on a visit-to visit basis. If ideal tooth movement has not been achieved after completion of the first sequence of aligners, additional trays, known as refinement trays, are required.
Who can participate
Age range
12 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Patients treated with either Comprehensive Invisalign or Invisalign Teen treatment
* The maxillary arch has less than 6 mm of crowding or spacing
* Maxillary lateral incisors have a minimum of 0.3 mm of extrusion prescribed in the Tooth Movement Table on the Invisalign ClinCheck for the first set of aligners
* Maxillary lateral incisors within a normal range of bucco-lingual inclination
* Patients 12 years of age or older and either the patient or legal guardian are able to give consent
* Patients confirm good compliance throughout the study period
Exclusion Criteria:
* Patients do not complete all aligners in the first phase as prescribed
* Poor compliance recorded for aligner wear
* Restorations placed or oral surgery completed prior to final scan
* Midcourse intervention to improve tracking such as a bootstrap
* Maxillary lateral incisors not tracking and noted by minimum of 1 mm of aligner material incisally displaced when aligner fully seated
* Treatment plans include surgery or extractions
* Maxillary lateral incisors with pathology and restorations
* Missing teeth other than third molars
* Patients with anterior crossbite
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Determine which of three different attachment sizes offers more predictable extrusion of maxillary lateral incisors in subjects treated with clear aligners compared
Timeframe: baseline until the clear aligner treatment is completed at 20 to 25 weeks